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Knowledge Base
Dew Point
Does it matter?
The short answer too does the dew point matter when installing a raised access floor is yes. One of the most overlooked factors when installing raised access flooring is the relationship between the substrate temperature and the surrounding air conditions. Even when a concrete floor appears completely dry, invisible moisture can form on its surface if the temperature falls too close to the dew point.
The dew point is the temperature at which airborne water vapour condenses into liquid water. If the substrate temperature is at or below the dew point, or within the recommended safety margin, a microscopic layer of condensation can develop across the surface. Whilst often impossible to see with the naked eye, this moisture can affect the performance and appearance of pedestal adhesives and tanking membrane coatings.
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In reality, instances of adhesion failure are incredibly rare and the moisture formed on concrete surfaces is simply used in the curing process of the adhesive however as with all types of adhesives, coatings and sealers​ it is best practice to ensure that the substrate temperature is at least 3°C above the calculated dew point before the application begins.
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